Perfect Circle MS829P1 P-Series Main Bearing Set Chevy Big Block .001 Undersize

The Perfect Circle MS829P1 is a high-performance main bearing set designed specifically for Chevrolet Big Block engines including 366, 396, 402, 427, 454, and 502 cubic inch applications from 1965 to present.

P-Series bearings are constructed of tri-metal cast copper lead, featuring a steel back for support, a cast copper lead lining to withstand the loads of engine operation, and an electroplated babbit overlay on the running surface. This sophisticated design provides superior performance compared to traditional bi-metal bearings.

Key Features:

• Intended for high-revving engines
• Higher eccentricity and high crush factor to compensate for high-load factors and distortion
• Oil grooves extend all the way around both halves for better oiling
• Provides superior conformability, embedability, slipperiness, and fatigue resistance
• Direct replacement for OEM applications

Part of the legendary Clevite 77 bearing family, these P-Series main bearings represent decades of proven performance in demanding applications. Whether you're building a performance engine or performing a precision rebuild, the MS829P1 bearing set delivers the reliability and durability required for high-performance Big Block Chevrolet engines.